@yacube: The Spectrum does now loading via tapein. I used the 3,3V Voltage on the spare io. A 3.3 K resistor to VCC , a 2.7 K resistor to GND and the headphone output of my pc sound card do the job.Thank you very much for your support.

@Boing4000Newest working core is attached. I´ll upload the sources as soon as i cleaned it up a little.The main clock of the core is exact enough to load programs with fast loader.

The Spectrum does now loading via tapein. I used the 3,3V Voltage on the spare io. A 3.3 K resistor to VCC , a 2.7 K resistor to GND and the headphone output of my pc sound card do the job.Thank you very much for your support.

Sounds very cool, but I don't feel up to trying to make a tape adapter for myself

If some one posts any easy to follow guide I can get a friend to follow or amigakit starts selling adapters I will defiantly give this core a try as my first Computer was a 128K+ Spectrum.

The current core now works on my Samsung LCD/TFT screen, thanks both of you!

I found some possible keyboard matter.Some function like , . + " and * cant be found on any key or kombination.I never own a Spectrum computer but using an emulator (Linux xspect) this keys are available.It seems the CTRL or ALT key is not assigned and some key function depent on it.

Also the Backspace function only works at <shift + 0> here.Perhaps this can be add too, like the 15KHz (PAL) switch via jumper

______________________________________________JMP $00000BED ; will guru-meditation until next morning

The keyboard works nearly like on a real 48 K rubber spectrum.For tape loding press j then right shift + p twice, after that you should see LOAD"" on the screen.To execute the command press ENTER.The keyboard is a little bit difficult for non Speccy users.

OK the " is to get with <r-shift + p> and the other symbol like , ; : is also to find on other letter with r-shift combination, thanks!Its freaky to code on this machine, without keyboard layout help... but its good to have another computer core for the Minimig V1 board

______________________________________________JMP $00000BED ; will guru-meditation until next morning

Can we define some protocol to alow pic/arm to upload spectrum roms or residos to minimig ram.I know that original minimig uses floppy controller for transfer.

Idea I was having is instead integrating rom in core make some kind of core request for file here is pseudo code.1.) Upload new core to minimig2.) Core bootrom requests file "spectrum.rom" to location $03.) ARM/Pic find file on SD/card transfers file to ram through fpga4.) Core resets and takes control

I know it requires lot of work but in general it would make possible to make any core spectrum/c64 to request required roms from sdcard and upload it to ram through pic/arm and free additional space on FPGA.

Other idea I was considering is to make simple text file e.g. "spectrum.cor"File would look like this:

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